kernel: update to 6.6.32

[ipfire-2.x.git] / config / etc / sysctl.conf

diff --git a/config/etc/sysctl.conf b/config/etc/sysctl.conf
index 832ad3d1c23ffa8f05a233cf09b7c5485cf9e386..31a220e384ea44ceb9d85b9257f03188f7474733 100644 (file)
--- a/config/etc/sysctl.conf
+++ b/config/etc/sysctl.conf
@@ -12,13 +12,13 @@ net.ipv4.tcp_syn_retries = 3
 net.ipv4.tcp_synack_retries = 3
 
 net.ipv4.conf.default.arp_filter = 1
-net.ipv4.conf.default.rp_filter = 0
+net.ipv4.conf.default.rp_filter = 1
 net.ipv4.conf.default.accept_redirects = 0
 net.ipv4.conf.default.accept_source_route = 0
 net.ipv4.conf.default.log_martians = 1
 
 net.ipv4.conf.all.arp_filter = 1
-net.ipv4.conf.all.rp_filter = 0
+net.ipv4.conf.all.rp_filter = 1
 net.ipv4.conf.all.accept_redirects = 0
 net.ipv4.conf.all.accept_source_route = 0
 net.ipv4.conf.all.log_martians = 1
@@ -31,6 +31,10 @@ vm.min_free_kbytes = 8192
 net.ipv6.conf.all.disable_ipv6 = 1
 net.ipv6.conf.default.disable_ipv6 = 1
 
+# However, enable some IPv6 hardening sysctl's in case this system is run customly _with_ IPv6.
+net.ipv6.conf.all.accept_redirects = 0
+net.ipv6.conf.default.accept_redirects = 0
+
 # Enable netfilter accounting
 net.netfilter.nf_conntrack_acct = 1
 
@@ -58,10 +62,6 @@ fs.protected_hardlinks = 1
 fs.protected_fifos = 2
 fs.protected_regular = 2
 
-# Minimal preemption granularity for CPU-bound tasks:
-# (default: 1 msec#  (1 + ilog(ncpus)), units: nanoseconds)
-kernel.sched_min_granularity_ns = 10000000
-
 # If a workload mostly uses anonymous memory and it hits this limit, the entire
 # working set is buffered for I/O, and any more write buffering would require
 # swapping, so it's time to throttle writes until I/O can catch up.  Workloads
@@ -83,11 +83,6 @@ vm.dirty_background_ratio = 3
 # and move them to swap cache
 vm.swappiness = 1
 
-# The total time the scheduler will consider a migrated process
-# "cache hot" and thus less likely to be re-migrated
-# (system default is 500000, i.e. 0.5 ms)
-kernel.sched_migration_cost_ns = 5000000
-
 # Increase kernel buffer size maximums
 net.ipv4.tcp_mem = 16777216 16777216 16777216
 net.ipv4.tcp_rmem = 4096 87380 16777216
@@ -110,3 +105,9 @@ net.ipv4.tcp_rfc1337 = 1
 
 # Include PID in file names of generated core dumps
 kernel.core_uses_pid = 1
+
+# Block non-uid-0 profiling
+kernel.perf_event_paranoid = 3
+
+# Only processes with CAP_SYS_PTRACE may use ptrace
+kernel.yama.ptrace_scope = 2